diff --git a/moto/iam/models.py b/moto/iam/models.py
index 4bc7a5447..98abc538d 100644
--- a/moto/iam/models.py
+++ b/moto/iam/models.py
@@ -292,8 +292,8 @@ class AccessKey(BaseModel):
 
     def __init__(self, user_name):
         self.user_name = user_name
-        self.access_key_id = random_access_key()
-        self.secret_access_key = random_alphanumeric(32)
+        self.access_key_id = "AKIA" + random_access_key()
+        self.secret_access_key = random_alphanumeric(40)
         self.status = 'Active'
         self.create_date = datetime.utcnow()
         self.last_used = datetime.utcnow()
diff --git a/moto/iam/utils.py b/moto/iam/utils.py
index f59bdfffe..2bd6448f9 100644
--- a/moto/iam/utils.py
+++ b/moto/iam/utils.py
@@ -7,7 +7,7 @@ import six
 def random_alphanumeric(length):
     return ''.join(six.text_type(
         random.choice(
-            string.ascii_letters + string.digits
+            string.ascii_letters + string.digits + "+" + "/"
         )) for _ in range(length)
     )
 
diff --git a/tests/test_iam/test_iam.py b/tests/test_iam/test_iam.py
index d1326712e..679d04d9c 100644
--- a/tests/test_iam/test_iam.py
+++ b/tests/test_iam/test_iam.py
@@ -584,8 +584,9 @@ def test_create_access_key():
         conn.create_access_key(UserName='my-user')
     conn.create_user(UserName='my-user')
     access_key = conn.create_access_key(UserName='my-user')["AccessKey"]
-    (datetime.utcnow() - access_key["CreateDate"].replace(tzinfo=None)).seconds.should.be.within(0, 2)
+    (datetime.utcnow() - access_key["CreateDate"].replace(tzinfo=None)).seconds.should.be.within(0, 10)
     access_key["AccessKeyId"].should.have.length_of(20)
+    access_key["SecretAccessKey"].should.have.length_of(40)
     assert access_key["AccessKeyId"].startswith("AKIA")